Recently there was a message about running out of phone storage. About the same time there was a security one about "no threats" found in the play store. I should hope not. I put two and two together and apparently the four is to disable, i. e., roll back updates of apps I seldom or never use. Sure enough, that seemed to take care of the problem, but I'd rather not have to do that in the first place. How do I prevent automatic updates, and how do I get rid of unwanted "builtin" apps without rooting (although I dearly would like to root this S5)?